Stanford University Designs Low-Cost Device To Generate Power At Night

Researchers have designed and optimized an exceptional low-cost, off-grid rooftop system to produce electricity at night.

Covid Vaccine- How Will Distribution Happen in India?

As vaccines are reaching final phases of trials and are estimated to be launched soon, one question remains – how will a country as...

SpaceX successfully launches an updated GPS satellite for the US Space Force

SpaceX successfully launched its anticipated GPS Navigation satellite with its Falcon 9 rocket on the evening of 5 November. The launch, conducted for the...

Bharat Biotech’s COVAXIN could be launched as early as February in India

Bharat Biotech's Covid-19 vaccine candidate Covaxin can be launched as early as February as latest tests on final-stage clinical trials and studies have so...

NASA Reconnects With 43-year Old Spacecraft Using DSN Dish

NASA’s mission operators have sent a series of command to NASA’s Voyager 2 from the first time since March.  The spacecraft, currently 11.6 billion...

US Scientists Develop Ultrapotent COVID-19 Vaccine Candidate

An ultrapotent nanoparticle vaccine has been developed as a candidate against COVID-19. Researchers, including the one from University of Washington claim that the vaccine...

The benefits of renewable sources such as solar are known to everyone. However, the challenging part is that the power from these sources is not readily available round-the-clock. Solar energy, for instance, is dependent on the distribution of sunlight and is therefore not a reliable source in many locations, especially at night. To counter this, researchers from Stanford University have come up with an alternative low-cost device that can efficiently generate power at night.

The research led by electrical engineer and physicist, Shanhui Fan shows how a modular, low-cost, off-grid energy source can generate electricity at night. The research findings have been published in the Journal Optics Express.

The study approaches radiative cooling to generate electricity. The technique utilizes the change in temperature produced due to the difference in heat absorbed by the surrounding air and the radiant cooling effect of cold space.

The scientists have theoretically shown how an optimized radiative cooling approach can generate a power of 2.2 Watts per square meter. Moreover, the rooftop unit does not require an external energy source or a battery to run. What’s peculiar is that the energy generated is about 120% times than what has been demonstrated ideally. This energy is adequate to power modular sensors like those used in the security and environmental sectors.

Researcher and co-author of the study, Lingling Fan stated:

We are working to develop high-performance, sustainable lighting generation that can provide everyone—including those in developing and rural areas—access to reliable and sustainable low cost lighting energy sources. A modular energy source could also power off-grid sensors used in a variety of applications and be used to convert waste heat from automobiles into usable power.

Thermoelectric Power Generator To Generate Power At Night

So how will radiative cooling be achieved? A thermoelectric power generator is among the most effective ways to implement radiative cooling for power generation. These devices are capable of converting temperature differences between two terminals into electricity. Primarily, the device consists of a heat source and a heat sink. The heat sink is maintained at a temperature lower than the heat source. This variation induces a direct current flow through the load. The devices utilize thermoelectric materials to produce power. The current generated is DC in nature and can be converted into AC using inverters.

In this research, the scientists focused on improving each step in the power generation to maximize the electricity produced from the rooftop system. The scientists increased energy harvesting, enabling more heat to pass through the device from the surrounding air. They also integrated readily available thermoelectric materials to maximize the performance of the system. Notably, thermoelectric power generators are less efficient compared to other mechanical generators. The scientists are working on this and optimizing the device for the best performance. They were able to determine that the best compromise between heat loss and thermoelectric conversion could be accomplished with a thermoelectric generator occupying one square meter on the rooftop.

Wei Li, a member of the team, stated:

One of the most important innovations was designing a selective emitter that is attached to the cool side of the device. This optimizes the radiative cooling process so that the power generator can more efficiently get rid of excessive heat.

The study was demonstrated using computer modelling to simulate the design with pragmatic physical parameters. The previous experimental findings were produced accurately, and it was showcased that this optimized system was capable of achieving what is expected to be the maximum performance using thermoelectric power generators.

Till now, the system is doing wonders for night-time power generation. The researchers are currently carrying out additional experiments for optimizing the device to adapt to day-time power generation as well. If successful, this system could extend the practical applications and revolutionize the round-the-clock (RTC) power supply, which is difficult to achieve with renewable sources of energy such as wind and solar. It is expected that the system will be useful in generating electricity in developing countries.


Read more:

IBM’s Summit Supercomputer to Push Research in Offshore Wind Energy Generation

[COVID-19 UPDATE]: Decoy Receptor To Neutralize Infection; Philippines to Conduct Sputnik V Phase 3 Trial

LEAVE A REPLY

Please enter your comment!
Please enter your name here

Hot Topics

ZTE Blade 20 Pro 5G launched officially: Everything you need to know

Popular Chinese manufacturer ZTE has finally announced the much-awaited 5G smartphone ZTE Blade 20 Pro 5G in China. Earlier, the company had launched a...

5 most innovative gadgets launched in 2020

The year 2020 has been one of the most challenging years for everyone. But these challenges did not restrict technological innovation to amaze us....

India risks losing its exports to a China-backed trade bloc

India may lose its key manufacturing export's market share to a China-backed Asian trade bloc. Last year Prime Minister Narendra Modi walked away from...

Related Articles

Covid Vaccine- How Will Distribution Happen in India?

As vaccines are reaching final phases of trials and are estimated to be launched soon, one question remains – how will a country as...

SpaceX successfully launches an updated GPS satellite for the US Space Force

SpaceX successfully launched its anticipated GPS Navigation satellite with its Falcon 9 rocket on the evening of 5 November. The launch, conducted for the...

Bharat Biotech’s COVAXIN could be launched as early as February in India

Bharat Biotech's Covid-19 vaccine candidate Covaxin can be launched as early as February as latest tests on final-stage clinical trials and studies have so...